Bob Benzon Valve Quotations

The left-hand modulator valve was changed the Saturday prior to the accident. It's a routine maintenance type thing. It modulates bleed air from the engine that's used for air-conditioning and pressurization of the aircraft.

They're activated by pulling -- which breaks a little valve or wire or something up there -- and if all of them that we find happen to have broken wires, then that's a pretty good indication that they were deployed.